What is the difference between the "no fly list" and the "selectee list"?

What is the difference between the "no fly list" and the "selectee list"?

The TSA maintains two lists. The no-fly list, which is a list of passengers who will not fly, and a list called the selectee list, which is a list of names of passengers who are suspected of posing a threat to civil aviation. Those passengers on the selectee list could be subjected to additional screening at the security checkpoint. They will, though, receive a boarding pass. The extra screening that they get at the security checkpoint could include the secondary screening where we do the pat down and we do the hand wanding of the passenger, and we check their carry-on bag. Additionally, that passenger on the selectee list might need to provide documentation at the ticket check-in counter to insure that he is not or she is not the person that we're looking for.